What is a cryogenic tank?

A cryogenic tank is a tank that is used to store liquids at very low temperatures, usually liquefied gasses (oxygen, argon, nitrogen, hydrogen, and helium) at -150°C or lower. They are also used for storing gasses at higher temperatures, such as liquefied natural gas.

Cryogenic tanks need to have special design in order to keep very low temperatures. They have an outer flask and an inner flask. Between the flasks, there is insulating material separated by vacuum. The flasks are connected only at the neck, that is why cryogenic tanks need to be handled with care. No impacts, vibration or tripping over should be used. Otherwise the insulation can be ruined and the tank become unusable.

Cryogenic tanks can be pressurized and non-pressurized.

Pressurized tanks are closed containers for storing and transporting liquids or gas at very low temperatures below -150C. They consist of inner pressure vessel, outer vessel, insulation and one or two necks with the valves, flanges or unions. Pressurized tanks are big and heavy, the most popular capacities are 120 liters and 230 liters. They are recommended for businesses with a higher number of daily sessions, like a gym, a spa, or a clinic.

Non-pressurized Dewar tanks are smaller and easier to handle. They offer highly efficient storage of cryogenic liquids combined with low weight and modest space requirements. This type of cryogenic tank is good for small businesses with about 10 customers per day or research labs. 

Cryomed’s cryosaunas are compatible with both types. With local cryogenic equipment, only non-pressurized tanks are used.